【摘要】 以酸化处理的XC-72炭黑作为载体,利用化学还原法制备不同Ag载量的Ag/C催化剂。通过XRD、投射电镜(TEM)测试,对Ag-Co/C催化剂的结构和形貌进行分析,并在酸性介质中测试Ag-Co/C的循环伏安和线性扫描曲线。结果表明:30%(质量分数)的Ag/C具有最高的电化学催化活性,Ag/C催化氧气还原时2电子和4电子转移并存。更多还原

【Abstract】 Ag/C catalysts with differential Ag loading were synthesized by chemically reducing silver salts using the acidized XC-72 carbon as the support. The structure and morphology of Ag/C catalysts were analyzed by XRD, SEM and TEM. Ag/C were studied in acid solution by cyclic voltammetry(CV) and linear sweep voltammetry(LSV) tests.The results indicte that acid treatment of XC-72 carbon improves the distribution of Ag nano-particals, 30% Ag/C has the highest electrochemical activity, and 2-electrons pathway and 4-electrons pathway happens when oxygen reduction reaction(ORR) appears catalyzed by Ag/C.更多还原